A- Here is a simple step by step breakdown of how to replace the rear cam O ring
seals on both V6 engines of the Montero Sport.
1) 6G72 3.0L V6- The
passenger side rear cam O ring seal can be done quite easily from the top of the
engine. All that is required is a 12mm wrench or 1/4" drive ratchet and socket
to remove the two bolts that hold the "eye shaped" aluminum plug into place.
Once you remove the 12mm bolts- twist and pull the aluminum plug straight
out taking note of it's orientation. Once removed, clean it off with parts
wash and replace the O ring seal with new one. For a longer lasting repair, add
a small amount of silicone sealant (automotive grade RTV) on the aluminum plug
where it will contact the flats of the cylinder head. Reinstall using the
reverse procedure making sure to install it with the two bolt holes ABOVE the
centerline of the plug.
The drivers side can be a bit trickier especially
with 4wd (since the front propeller shaft can get in the way from underneath).
The drivers head is much closer to the bulkhead (firewall) than the passenger
side- leaving no choice but to tackle this job from below. The easiest access is
from the front drivers side wheel well. More best access, prop the truck on a
jack and remove the drivers front wheel- otherwise, leave the wheel on and turn
the steering wheel to give you better access. Once the inside splash shield is
removed, the plug is within arms reach. It will help if you remove the upper
half of the transmission dipstick (remove dipstick, remove upper dipstick
mounting bolts on the cylinder head bracket, and lower dipstick mounting bolt on
the transmission) but is not neccesary if you have the patience. All you have to
do is the exact same thing as you did on the other head- removing the 2 mounting
bolts and removing the aluminum plug. When installing, make sure the bolt holes
are BELOW the centerline of the aluminum plug.
2) 6G74 3.5L V6 -
Everything above applies to this engine EXCEPT that since it is mounted more
forward in the engine compartment than the 3.0L, BOTH sides can be tackled
easily from above the engine compartment. The passenger side can be done EXACTLY
the same as the 3.0L- while the drivers side can be done with the help of a
small mirror or just by going by feel......either way, the 3.5L is MUCH easier
to perform this repair on
I have seen some crack in that location as well. If it's not the cam seals then i would look into a hairline crack!
326 views
Usually answered in minutes!
×